Drying cylinder



Aug. 30,1927. 1,640,855

\ L. -SHLICK DRYING CYLINDER Filed Sept. 25, 1926 2 Sheets-Shea?l 1 Figi Aug. so, 1927.

L. SHLICK DRYING CYLINDER Filed sept. 2,3, 192e IIIII 2 Sheets-Sheet 2 80 ter,

' 'Patented Aug. 30, 1927.

PATENT OFFICE.

uio siILIcx, or aos'rou, mssncnusnr'rs.

DBYIG CYLINDER.

application ma :wenn: as. me. serial ita-isms?.

The objects of this invention are, first, the -eiecting of means for preventing workmen from catching their clothing1 uon the bolts which attach the heads to t e rying cylin- 8 ders used in paper making; second, to means for reducing the radiation of heat from the ends of the cylinders; and, third, to means for the automatic discharge from thecylinders of the Water which condenses lfrom vl. the steam which is let therein for heating them. A l

For the rst two purposes, I provide a head-enclosure which is adapted to cover both its own attaching bolts and those of 16 the head itself; and which is also provided ""with insulating material for preventing heat radiation. For the third purpose, I provide .a receiving s` ace-'farther from the axis o Y the cylinder t an is the periphery of the latinto which the water of condensation asses from the cylinder, and from which it is discharged through one of lthe trunmons.

In the drawings forming part of* this specication, Fig. 1 is a longitudinal section a of a drying cylinder embodying one form of the vinvent-ion. Fig. 2'is a diametrical section of an insulating cover. Fig. 3 is a sec-r tion on the irregular line 3-3 in Fig. 1.

Fig. 4 is an inner view of a cover. Fig. 5

is a longitudinal section of another form oi the invention. Fi 6 is a section on the line 6.-6 in Fig. 5.' ig. 7 is a section of an- 4 other forni of the invention; and Fig. 8is a detail sectional view of the same.

The drum or cylinder 1 has at one end a hea'd 2 attached/thereto b bolts 3, and at the other end a diametrica y enlarged head 4 provided with means for discharging through atrunnion the water of condensation entering it from the cylinder. means for such discharge illustrated in Figs.

'A 1 and A3, consists of one or'more chambers 5 -eachhaving an opening 6 for the entrance of the water, anda drainage conduit 7 passing therefrom to and throught-the trunnion 9.

' Whatever water'condenses from'thesteam admitted to the' cylinder through the. trunv nion 11, will flow from the cylinder into the Y hollow head 4, and thence through an` opening 6 into the rst chamber 5 which reaches the lowermost point in the rotation` of the c linder. Then, when this chamber has been evated to a lsuiieient height, the waiter -tlovlvs f i its trunnion.

The'

therefrom through the conduits 7, 10 to the exterior of the cylinder.

The protecting cover or shield consists of two segments 12 each having a semi-circular hub 13.1oosely fitting a trunnion, and provided with`bolts-14 having their heads sunk therein, for thel attachment of the shields to the cylinder. ,The shields are also formed with an annular oove 15 for enclosing the heads ofthe bolts 3, an'd thereby keeping the latter from injuring the clothing or persons of the workmen.

Between the groove 15 and the hub 13 of a shield are two semi-circular non-conducting pads 16, preferably composed of asbesto's suitably reinforced. An insulating collar 17 isintroduced between the hub 13 and over the pads 16; and insulating.- material 20 is inserted in a .tion o f the shiel It 1s customary to provide the dryin drums usedin most of the pulp mills, wi

interior anges 21 to which to bolt the heads. For these drums, as 22 in Fi 5 it is impossible to employ the form of ead 4 shown in Fig. 1 for the reason thatthe water of condensation cannot flow past the flanges.

To accommodate the same, I have devised vtwo slightly different constructions of'head.

Sheet metal 19 is fastened glroove in the outermost por-4.

In that illustrated in Fi 5 and 6, holes' I 23 are drilled through*v t e iianges 21 for the assage of the water into the enlarged dp 25, from which the water can be removed in the same manner as shown in Figs.

1 and'3, or in the manner shown in Figs.

5 and 6. The arrangement here illustrated consists of a'statlonary drainage tube 26 in the trunnion 27, having an enlarged troughlike portion 29 within'V the head 25, which is open upward as shown in` Fig. 6. In the head V25 yis a plurality of approximately radial artit'ions 30, between the `outer wall of the liead and a diametrical partition 31, the latter having al hole 32 between each air gf Iirtitions close tothe annular wall o the The water collected within the drum passes out through the holes 23 into the en larged head 25, and thence through the hol/es 32 into each chamber located between two neighboringpartitions 30 as it reaches ,its lowerinost position during the rotation of end of a partition is higher than its innerv end and the contents thereof can be emptied the drum. Then, as the drum and head rotate, the water is taken up until the outer lare separate and are bolted to the inner surface of the head 34, being in effect a series vau 'of troughs, and attached to 'the head from Within the drum before its opposite lhead has been put in place.

The opposite head 36 I prefer to protect by means of insulation consisting of reinforcing netting 37 and asbestos 39 confined to the head by means of a sheet metal element 40.

In addition to the holes 23 shown in Fig.

5 for the passage of the water of condensation past the flange 21, I prefer to provide a form of scoop 41 attached to the inner surface of the cylinder 22 in a slightly helical v manner, whereby, as the cylinder revolves,

the water is scooped up and runs along the floor of the part 41 until it reaches the neck 42 and is poured into the enlarged head 25.

. One reason why such a scoop is desirable is that the holes 23 are liable to become more or less clogged by' accumulations of rust and scale and thereby fail to deliver the water as readily as they should.

What I claim as my invention is:

1. A drying cylinder comprising a shell having a cylindrical drying surface, and

heads provided with supporting trunnions,

one of said trunnions-being tubular and the head connected therewith enclosingf'a space ,between itself and the adjacent end of said shell whose radial extent is in excess of that of the outer surface of said shell, the

t inner surface of the latter opening into said space, and means for supplying the cylinder with steam, and for expelhng the water of condensation from said space out throughvsaid tubular trunnion.`

2. A drying cylinder comprisin a shell having a cylindrical drying sur ace, and heads provided with supporting trunnions, one of said heads enclosing a space between itself and the adjacent end of said shell whose radial extent is in excess of that of` the outer drying surface of the shell, and means for supplying the cylinder with steam and for expelling the waterI of condensation from said space out through one of said trunnions.

3. A drying cylinder as set forth in claim 2 having a scoop attached to the inner surofcondensation from said surface to said space.

4; A drying cylinder as set forth in claim 2 having a scoop attached to the linner surface thereof and disposed obliquely to the axial line thereof.

5. The combination in a drying cylinder havmg means for the mtroduction of steam therein and provided with terminal trunnions one of which is hollow, of a head at an end ofthe cylinder enclosing a substantial space -between itself "and the adjacent end ofthe cylinder, the-.diameter of -face thereofdisposed for Vdelivering water said space being far in excess of that of the cylinder to accommodate at any moment all the water of condensation within the cylinder, and means for expelling the water of condensation from said space out through said hollow trunnion.

6. A drying cylinder as set forth in claim 5 wherein steam pressure is the agent for the expulsion of the water of condensation.

7. The combination in a drying cylinder having means for the introduction of steam at one end and provided with hollow supporting trunnions, of a head attached to the other en d of the cylinder from that receiving the steam and enclosing a substantial space between itself and the end of the cyl inder, the diameter of said space being far in excess of that of the cylinder to accommo.

date at any moment all the water of condensation within the cylinder, and means acted upon by the steam pressure within the cylinder to expel the water of condensation from said space through` the adjacent hollow trunnion.

8. A drying cylinder as set forth in claim 47, the trunnion through which the water is expelled being integral with said head.

9. The combination in a drying cylinder having trunnions and means for the introduction jof steam therein, of a head attached to an end of the cylinder to enclose a substantial space between said end and itself,

vthe diameter of which is far in excess of that of the cylinder, a chamber in said space communicating'with and through the associated trunnion, said chamber having itsouter Wall spaced lfromvthe end of the cylinder but communicating therewith,` the inner surface of ,the` cylinder reaching uninterruptedly to said space. v

10. The combination witha drying cylinder having trunnions and means for the introduction of steam therein, of a head attached to an end of the cylinder to enclose a substantial space between such end and itself the diameter of which .is'far in excess of that of the cylinder, a chamber in said space communicating with and throu h the ,associated trunnion, said chamber having its outer wall spaced from the end of thel cylinder and perforated at its radially outermost margin, and the inner surface of the cylinder reaching uniterruptedly to said space. 7 11. A hollow drying cylinderk consisting of a shell having end plates for excluding thev atmosphere, and supporting trunnions,

means for admitting pressure steam within the cylinder, means for withdrawing the water of condensation therefrom, and insulating material strengthened by metallic reinforcement for the end plates.

In testimony that I cla-im the'foregoing in vention, I havehereunto set my hand this 21st day of September, 1926.

LEO SHLICK. 

